Add metrics for interactions with the Apps Launcher promo dialog.

chrome/browser/ui/webui/app_launcher_page_ui.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/app_launcher_page_ui.h"
 
+#include "apps/app_launcher.h"
 #include "base/memory/ref_counted_memory.h"
+#include "base/metrics/histogram.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
 #include "chrome/browser/ui/webui/ntp/app_resource_cache_factory.h"
 #include "chrome/browser/ui/webui/ntp/ntp_login_handler.h"
 #include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_ui.h"
 #include "grit/generated_resources.h"
@@ skipping 84 matching lines @@
   resource->set_should_show_most_visited_page(false);
   resource->set_should_show_other_devices_menu(false);
   resource->set_should_show_recently_closed_menu(false);
 
   content::RenderProcessHost* render_host =
       content::RenderProcessHost::FromID(render_process_id);
   bool is_incognito = render_host->GetBrowserContext()->IsOffTheRecord();
   scoped_refptr<base::RefCountedMemory> html_bytes(
       resource->GetNewTabHTML(is_incognito));
 
+  if (!is_incognito) {
+    if (apps::IsAppLauncherEnabled()) {
+      AppLauncherHandler::RecordAppLauncherPromoHistogram(
+          apps::APP_LAUNCHER_PROMO_ALREADY_INSTALLED);
+    } else if (apps::ShouldShowAppLauncherPromo()){
+      AppLauncherHandler::RecordAppLauncherPromoHistogram(
+          apps::APP_LAUNCHER_PROMO_SHOWN);
+    }
+  }
+
   callback.Run(html_bytes.get());
 }
 
 std::string AppLauncherPageUI::HTMLSource::GetMimeType(
     const std::string& resource) const {
   return "text/html";
 }
 
 bool AppLauncherPageUI::HTMLSource::ShouldReplaceExistingSource() const {
   return false;
 }
 
 bool AppLauncherPageUI::HTMLSource::ShouldAddContentSecurityPolicy() const {
   return false;
 }
 
 AppLauncherPageUI::HTMLSource::~HTMLSource() {}